import java.util.Scanner;

public class Test {
}
class School{
    public Student[]students;
    public Teacher[]teacher;
    public School(){
        this.teacher=new Teacher[10];
        this.students=new Student[10];
    }

}
class Base {
    Base() {
        System.out.print("Base");
    }
}

class Base1{
    public Base1(String s){
        System.out.print("B");
    }
}

class X{
    Y y=new Y();//1
    public X(){//2
        System.out.print("X");
    }
}
class Y{
    public Y(){//3
        System.out.print("Y");
    }
}
class Z extends X{
    Y y=new Y();//4
    public Z(){//5
        System.out.print("Z");
    }
    public static void main(String[] args) {
        new Z();
    }
}





class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (scanner.hasNextInt()) {
            int x = scanner.nextInt();
            int y = scanner.nextInt();
            int z = scanner.nextInt();
            Sub sub = new Sub(x, y, z);
            System.out.println(sub.calculate());
        }
    }

}

class Base4 {

    private int x;
    private int y;

    public Base4(int x, int y) {
        this.x = x;
        this.y = y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

}

class Sub extends Base4 {

    private int z;

    public Sub(int x, int y, int z) {
        //write your code here
        super(x,y);
        this.z=z;
    }